Multi-layer co-extrusion preparation device for packaging barrier film

Abstract

The invention provides a packaging barrier film multi-layer co-extrusion preparation device, and relates to the field of food and drug packaging, the packaging barrier film multi-layer co-extrusion preparation device comprises a preparation support, a preparation shield, an extrusion main body, a protective guard plate, a barrier guard plate, a preparation cooling roller, a diaphragm extrusion mechanism, an extrusion protection mechanism and a cooling cleaning mechanism; the preparation shield is fixedly connected to the preparation bracket; the extrusion main body is fixedly connected to the upper end surface of the preparation bracket; the protective plate is rotationally connected to the inner end surface of the extrusion main body; the blocking protection plate is rotationally connected to the inner end face of the extrusion body. The preparation cooling roller is rotationally connected to the interior of the preparation protective cover; the diaphragm extrusion mechanism is arranged in the preparation shield; the extrusion protection mechanism is arranged in the extrusion main body; and the cooling and cleaning mechanism is arranged in the preparation shield. And by means of the material extrusion protection mechanism, materials can be conveniently added by workers, and by means of the cooling cleaning mechanism, it is guaranteed that the prepared cooling roller is clean and tidy. The problem that the temperature of a feeding port is affected when workers conduct filling is solved.

Description

Technical Field

[0001] The invention relates to the technical field of food and medicine packaging, and in particular to a packaging barrier film multi-layer co-extrusion preparation device. Background Art

[0002] Packaging bags are needed for food and medicine packaging. Packaging bags are composed of packaging barrier films. Packaging barrier films are composed of multiple layers during production. A multi-layer co-extrusion preparation device is required for the production of packaging barrier films. The material of the multi-layer packaging barrier film is placed into the extruder of the device. The extruder squeezes the material into the film, and then the multi-layer film is processed, extruded and combined together to form a barrier film.

[0003] According to CN202323644657.5, the utility model discloses a co-extrusion preparation device for a multi-layer film, which relates to the technical field of multi-layer film production, including a frame, a secondary heating device, a winding device and a plurality of extruders arranged in parallel, two matching extrusion composite rollers are arranged below the multiple extrusion ports, a first cooling roller assembly is arranged below the extrusion composite roller, two matching secondary pressing rollers are arranged below the secondary heating device, a second cooling roller assembly is arranged below the secondary pressing roller, the first cooling roller assembly and the second cooling roller assembly both include a mounting frame and a plurality of cooling roller units arranged vertically, the cooling roller unit includes a linear drive, a first cooling roller and a second cooling roller, the first cooling roller is connected to the mounting frame in a transverse sliding manner, and the second cooling roller is connected to the mounting frame in a transverse sliding manner. The above-mentioned co-extrusion preparation device can make an appropriate number of cooling roller units contact with the multi-layer film, ensure the film extrusion speed while ensuring the cooling effect, and improve the production efficiency of the device.

[0004] However, the multi-layer co-extrusion preparation device generally adds the material of the barrier film through the feed port structure. Since the feed port has a certain temperature, when the staff opens the protective cover on the feed port to fill it, the temperature inside the feed port is easy to flow out from the inside of the feed port, affecting the temperature of the feed port, thereby affecting the heating efficiency of the material. At the same time, the material needs to be added to the feed port in a quantitative manner to ensure the filling density. When the material falls directly into the feed port, it is difficult to accurately control the amount of material filling, which affects the sealing performance of the filler. Summary of the invention

[0005] In view of this, the present invention provides a packaging barrier film multi-layer co-extrusion preparation device, which has a function that workers add materials on a blocking guard plate, and the blocking guard plate blocks the unloading of hot air, thereby avoiding the problem of opening the extrusion body to cause hot air to flow out and affect the internal temperature, and at the same time it is convenient for workers to observe the materials added on the blocking guard plate.

[0006] The present invention provides a purpose and function of a multi-layer co-extrusion preparation device for packaging barrier film, which specifically includes: a preparation bracket, a preparation shield, an extrusion body, a processing body, a protective guard plate, a blocking guard plate, a preparation cooling roller, a cleaning scraper, a diaphragm extrusion mechanism, an extrusion protection mechanism and a cooling and cleaning mechanism; the preparation shield is fixedly connected to the upper side of the preparation bracket; the extrusion body is provided with a plurality of groups, and the plurality of groups of extrusion bodies are respectively fixedly connected to the middle position of the upper end surface of the preparation bracket; the processing body is fixedly connected to the lower side of the inner end surface of the preparation bracket; the protective guard plates are provided with a plurality of groups, and the plurality of groups of protective guard plates are respectively rotatably connected to the inner end surfaces of the plurality of groups of extrusion bodies side; the blocking guard plates are arranged in a total of multiple groups, and the multiple groups of blocking guard plates are rotatably connected to the middle position of the inner end faces of the multiple groups of extrusion bodies; the preparation cooling rollers are arranged in a total of two groups, and the two groups of preparation cooling rollers are rotatably connected to the lower side of the inside of the preparation shield; the cleaning scrapers are arranged in a total of two groups, and the two groups of cleaning scrapers slide on the left and right sides of the inside of the preparation shield, and the two groups of cleaning scrapers slide on the outside of the two groups of preparation cooling rollers; the diaphragm extrusion mechanism is arranged inside the preparation shield; the extrusion protection mechanism is arranged in a total of multiple groups, and the multiple groups of extrusion protection mechanisms are respectively arranged inside the multiple groups of extrusion bodies; the cooling and cleaning mechanism is arranged inside the preparation shield.

[0007] Furthermore, the diaphragm extrusion mechanism includes: a discharge pipe, a change-direction pipe and a preparation composite roller; the discharge pipe is fixedly connected to the lower end face of the extrusion body at the middle position; the change-direction pipes are provided in a plurality of groups, and the plurality of groups of change-direction pipes are respectively fixedly connected to the lower end faces of the extrusion bodies on the left and right sides; the preparation composite rollers are provided in two groups, and the two groups of preparation composite rollers are respectively rotatably connected to the upper side of the inside of the preparation shield; the two groups of preparation composite rollers are respectively rotated on the discharge pipe and the lower side of the plurality of groups of change-direction pipes.

[0008] Furthermore, the extrusion protection mechanism includes: a protection shaft, a protection pulley, a protection transmission belt and a connecting pulley; the protection shaft is rotatably connected to the upper side of the extrusion body, and the protection shaft and the protection guard plate are fixedly connected; the protection pulley is coaxially fixedly connected to the left side of the protection shaft; the connecting pulley is rotatably connected to the inside of the extrusion body; the protection transmission belt is transmission-connected to the outer end faces of the protection pulley and the connecting pulley.

[0009] Furthermore, the extrusion protection mechanism also includes: a protection half gear and a direction-changing gear; the protection half gear is coaxially fixedly connected to the right side of the connecting pulley; the direction-changing gear is rotatably connected to the inside of the extrusion body, and the protection half gear and the direction-changing gear are meshed to form a gear transmission mechanism.

[0010] Furthermore, the extrusion protection mechanism also includes: a blocking shaft and a blocking gear; the blocking shaft is rotatably connected to the inside of the extrusion body, and the blocking shaft and the blocking guard plate are fixedly connected; the blocking gear is coaxially fixedly connected to the left side of the blocking shaft, and the blocking gear and the changing gear are meshed to form a gear transmission mechanism.

[0011] Furthermore, the cooling and cleaning mechanism includes: a cooling motor and a cooling shaft; the cooling motor is fixedly connected to the rear side of the preparation shield; there are two groups of cooling shafts, and the two groups of cooling shafts are rotatably connected to the lower side of the preparation shield respectively, and the two groups of cooling shafts are coaxially fixedly connected to the two groups of preparation cooling rollers respectively, and one group of cooling shafts on the right is coaxially fixedly connected to the cooling motor shaft.

[0012] Furthermore, the cooling and cleaning mechanism also includes: cooling gears; there are two groups of cooling gears, the two groups of cooling gears are coaxially fixedly connected to the rear sides of the two groups of cooling shafts, and the two groups of cooling gears are meshed with each other to form a gear transmission mechanism.

[0013] Furthermore, the cooling and cleaning mechanism also includes: a cooling pulley, a cooling transmission belt, a cleaning shaft and a cleaning pulley; there are two groups of cooling pulleys, and the two groups of cooling pulleys are coaxially fixedly connected to the front sides of the two groups of cooling shafts; there are two groups of cleaning shafts, and the two groups of cleaning shafts are rotatably connected inside the preparation shield; there are two groups of cleaning pulleys, and the two groups of cleaning pulleys are coaxially fixedly connected to the front sides of the two groups of cleaning shafts; there are two groups of cooling transmission belts, and the two groups of cooling transmission belts are respectively transmission-connected to the two groups of cooling pulleys and the outer end faces of the two groups of cleaning pulleys.

[0014] Furthermore, the cooling and cleaning mechanism also includes: cleaning cams and cleaning springs; the cleaning cams are provided in multiple groups, and the multiple groups of cleaning cams are respectively fixedly connected to the two groups of cleaning shafts, and the multiple groups of cleaning cams are respectively rotated on the upper sides of the two groups of cleaning scrapers; the cleaning springs are provided in multiple groups, and the multiple groups of cleaning springs are respectively fixedly connected to the inside of the preparation shield, and the multiple groups of cleaning springs are respectively elastically connected to the lower end surfaces of the two groups of cleaning scrapers.

[0015] The beneficial effects of the present invention are: The present invention adopts a diaphragm extrusion mechanism to realize that after the extruder extrude the material into shape, the multi-layer barrier film is further extruded and connected together by the preparation composite roller, the preparation cooling roller cools the multi-layer barrier film, and the processing body performs subsequent processing on the barrier film, so that the barrier film can be produced quickly.

[0016] In addition, by adopting the extrusion protection mechanism, when the staff adds material to the extrusion body, the blocking guard plate blocks the material outlet when the protective guard plate is opened. The staff adds the material on the blocking guard plate, and the blocking guard plate blocks the unloading of the hot air, thereby avoiding the problem of hot air outflow affecting the internal temperature due to opening the extrusion body. At the same time, it is convenient for the staff to observe the material added on the blocking guard plate. When the staff closes the protective guard plate, the blocking guard plate is opened and the material enters the extrusion body.

[0017] In addition, by adopting a cooling and cleaning mechanism, when the cooling roller rotates to cool the barrier film, the cleaning scraper vibrates to clean impurities on the surface of the cooling roller, ensuring that the surface of the cooling roller is clean and tidy, thereby ensuring the cooling quality of the cooling roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0019] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0020] In the attached picture: Figure 1 It is a schematic structural diagram of a front view of a preparation device according to an embodiment of the present invention.

[0021] Figure 2 It is a schematic diagram of the internal structure of the preparation device of an embodiment of the present invention.

[0022] Figure 3 It is a schematic structural diagram of an extrusion body according to an embodiment of the present invention.

[0023] Figure 4 It is a structural schematic diagram of the material extrusion protection mechanism of an embodiment of the present invention.

[0024] Figure 5 It is a schematic structural diagram of the transmission of the extrusion protection mechanism of an embodiment of the present invention.

[0025] Figure 6 It is a schematic diagram of the overall structure of the cooling and cleaning mechanism of an embodiment of the present invention.

[0026] Figure 7 It is a schematic structural diagram of the rotation of the cooling roller in an embodiment of the present invention.

[0027] Figure 8 It is a schematic structural diagram of the cooling and cleaning mechanism transmission of an embodiment of the present invention.

[0028] List of figure marks: 1. Prepare the bracket; 2. Prepare the shield; 3. Extrusion body; 4. Discharge pipe; 5. Change pipe; 6. Prepare the composite roller; 7. Processing body; 8. Protect the rotating shaft; 801. Protect the pulley; 9. Protect the guard plate; 10. Protect the transmission belt; 11. Protect the half gear; 1101. Connecting pulley; 12. Change gear; 13. Block the rotating shaft; 1301. Block the gear; 14. Block the guard plate; 15. Cooling motor; 16. Cooling the rotating shaft; 1601. Cooling gear; 1602. Cooling pulley; 17. Prepare cooling roller; 18. Cooling transmission belt; 19. Clean the rotating shaft; 1901. Clean the pulley; 1902. Clean the cam; 20. Clean the scraper; 2001. Clean the spring. DETAILED DESCRIPTION

[0029] Example 1: Please refer to Figures 1 to 5 As shown: The present invention provides a packaging barrier film multilayer co-extrusion preparation device, comprising a preparation bracket 1, a preparation shield 2, an extrusion body 3, a processing body 7, a protective guard plate 9, a blocking guard plate 14, a preparation cooling roller 17, a cleaning scraper 20, a diaphragm extrusion mechanism and an extrusion protection mechanism; the preparation shield 2 is fixedly connected to the upper side of the preparation bracket 1; a total of multiple groups of extrusion bodies 3 are provided, and the multiple groups of extrusion bodies 3 are respectively fixedly connected to the middle position of the upper end surface of the preparation bracket 1; the processing body 7 is fixedly connected to the lower side of the inner end surface of the preparation bracket 1; a total of multiple groups of protective guard plates 9 are provided, and the multiple groups of protective guard plates 9 are respectively rotatably connected to the inner ends of the multiple groups of extrusion bodies 3 The upper side of the surface; a total of multiple groups of blocking guard plates 14 are arranged, and the multiple groups of blocking guard plates 14 are rotatably connected to the middle position of the inner end faces of the multiple groups of extrusion bodies 3; a total of two groups of preparation cooling rollers 17 are arranged, and the two groups of preparation cooling rollers 17 are rotatably connected to the lower side of the inside of the preparation shield 2; a total of two groups of cleaning scrapers 20 are arranged, and the two groups of cleaning scrapers 20 slide on the left and right sides of the inside of the preparation shield 2, and the two groups of cleaning scrapers 20 slide on the outside of the two groups of preparation cooling rollers 17; the diaphragm extrusion mechanism is arranged inside the preparation shield 2; a total of multiple groups of extrusion protection mechanisms are arranged, and the multiple groups of extrusion protection mechanisms are respectively arranged inside the multiple groups of extrusion bodies 3.

[0030] Among them, the diaphragm extrusion mechanism includes: a discharge pipe 4, a change-direction pipe 5 and a preparation composite roller 6; the discharge pipe 4 is fixedly connected to the lower end face of the extrusion body 3 at the middle position; there are a plurality of change-direction pipes 5, and the plurality of change-direction pipes 5 are respectively fixedly connected to the lower end faces of the extrusion bodies 3 on the left and right sides; there are two groups of preparation composite rollers 6, and the two groups of preparation composite rollers 6 are respectively rotatably connected to the upper side of the inside of the preparation shield 2; the two groups of preparation composite rollers 6 are respectively rotated on the discharge pipe 4 and the lower sides of the plurality of change-direction pipes 5. During use, the barrier film flows out from the discharge pipe 4 and the change-direction pipe 5 to be extruded into long strips, and the barrier film reaches the preparation composite roller 6, and the preparation composite roller 6 extrude and composite the barrier film. After composite, the barrier film reaches the preparation cooling roller 17 for cooling, and the cooled barrier film is then transmitted to the processing body 7, and the processing body 7 processes and shapes the barrier film.

[0031] Among them, the extrusion protection mechanism includes: a protection shaft 8, a protection pulley 801, a protection transmission belt 10 and a connecting pulley 1101; the protection shaft 8 is rotatably connected to the upper side of the extrusion body 3, and the protection shaft 8 and the protection guard plate 9 are fixedly connected; the protection pulley 801 is coaxially fixedly connected to the left side of the protection shaft 8; the connecting pulley 1101 is rotatably connected to the inside of the extrusion body 3; the protection transmission belt 10 is transmission-connected to the outer end faces of the protection pulley 801 and the connecting pulley 1101. During use, the staff pry the protection guard plate 9 to rotate and drive the protection shaft 8 to rotate, the protection shaft 8 rotates to drive the protection pulley 801 to rotate, the protection pulley 801 rotates to drive the protection transmission belt 10 to transmit, and the protection transmission belt 10 transmits and drives the connecting pulley 1101 to rotate.

[0032] Among them, the extrusion protection mechanism also includes: a protection half gear 11 and a changing gear 12; the protection half gear 11 is coaxially fixedly connected to the right side of the connecting pulley 1101; the changing gear 12 is rotatably connected to the inside of the extrusion body 3, and the protection half gear 11 and the changing gear 12 are meshed to form a gear transmission mechanism. During use, the connecting pulley 1101 rotates to drive the protection half gear 11 to rotate, and the protection half gear 11 rotates to drive the meshing changing gear 12 to rotate.

[0033] Among them, the extrusion protection mechanism also includes: a blocking shaft 13 and a blocking gear 1301; the blocking shaft 13 is rotatably connected to the inside of the extrusion body 3, and the blocking shaft 13 and the blocking guard plate 14 are fixedly connected; the blocking gear 1301 is coaxially fixedly connected to the left side of the blocking shaft 13, and the blocking gear 1301 and the changing gear 12 are meshed to form a gear transmission mechanism. During use, the changing gear 12 rotates to drive the meshing blocking gear 1301 to rotate, and the blocking gear 1301 rotates to drive the blocking shaft 13 to rotate, and the blocking shaft 13 rotates to drive the blocking guard plate 14 to rotate. When the protective guard plate 9 is opened, the blocking guard plate 14 is closed, the extrusion body 3 is sealed and material can be injected into the extrusion body 3.

[0034] Specific usage and function of the first embodiment: During the use of the present invention, the barrier film flows out from the discharge pipe 4 and the redirection pipe 5 to be extruded into long strips, and the barrier film reaches the preparation composite roller 6, and the preparation composite roller 6 extrude and composite the barrier film. After the composite, the barrier film reaches the preparation cooling roller 17 for cooling, and the cooled barrier film is then transferred to the processing body 7, and the processing body 7 processes and shapes the barrier film. The staff bends the protective guard plate 9 to rotate and drive the protective shaft 8 to rotate, and the rotation of the protective shaft 8 drives the protective pulley 801 to rotate, and the rotation of the protective pulley 801 drives the protective transmission belt 1 0 transmission, the protection transmission belt 10 drives the connecting pulley 1101 to rotate, the connecting pulley 1101 rotates and drives the protection half gear 11 to rotate, the protection half gear 11 rotates and drives the meshing changing gear 12 to rotate, the changing gear 12 rotates and drives the meshing blocking gear 1301 to rotate, the blocking gear 1301 rotates and drives the blocking shaft 13 to rotate, the blocking shaft 13 rotates and drives the blocking guard plate 14 to rotate, when the protection guard plate 9 is opened, the blocking guard plate 14 is closed, the extrusion body 3 is sealed and material can be injected into the extrusion body 3, so as to realize the production of barrier film and the material filling of barrier film.

[0035] Example 2: Based on Example 1, please refer to Figure 6 and Figure 8 As shown: The present invention provides a multi-layer co-extrusion preparation device for packaging barrier film, which also includes a cooling and cleaning mechanism, which is arranged inside a preparation shield 2, and includes: a cooling motor 15 and a cooling shaft 16; the cooling motor 15 is fixedly connected to the rear side of the inside of the preparation shield 2; there are two groups of cooling shafts 16, and the two groups of cooling shafts 16 are respectively rotatably connected to the lower side of the inside of the preparation shield 2, and the two groups of cooling shafts 16 are respectively coaxially fixedly connected to two groups of preparation cooling rollers 17, and the right side group of cooling shafts 16 is coaxially fixedly connected to the cooling motor 15 shaft. During use, the rotation of the cooling motor 15 shaft drives the right side group of cooling shafts 16 to rotate, and the rotation of the right side group of cooling shafts 16 drives the right side group of preparation cooling rollers 17 to rotate.

[0036] Among them, the cooling and cleaning mechanism also includes: cooling gears 1601; there are two groups of cooling gears 1601, and the two groups of cooling gears 1601 are coaxially fixedly connected to the rear sides of the two groups of cooling shafts 16 respectively, and the two groups of cooling gears 1601 are meshed with each other to form a gear transmission mechanism. During use, the right side group of cooling shafts 16 rotates to drive the cooling gears 1601 to rotate, and the two groups of cooling gears 1601 mesh with each other and rotate at the same time to drive the two groups of preparation cooling rollers 17 to rotate at the same time to cool the barrier film.

[0037] The cooling and cleaning mechanism also includes: a cooling pulley 1602, a cooling drive belt 18, a cleaning shaft 19 and a cleaning pulley 1901; there are two groups of cooling pulleys 1602, and the two groups of cooling pulleys 1602 are coaxially fixedly connected to the front sides of the two groups of cooling shafts 16; there are two groups of cleaning shafts 19, and the two groups of cleaning shafts 19 are rotatably connected to the inside of the preparation shield 2; there are two groups of cleaning pulleys 1901, and the two groups of cleaning pulleys 1901 are coaxially fixedly connected to the front sides of the two groups of cooling shafts 16. Connected to the front side of the two groups of cleaning shafts 19; there are two groups of cooling transmission belts 18, and the two groups of cooling transmission belts 18 are respectively connected to the outer end surfaces of the two groups of cooling pulleys 1602 and the two groups of cleaning pulleys 1901. During use, the rotation of the cooling shaft 16 drives the cooling pulley 1602 to rotate, the rotation of the cooling pulley 1602 drives the cooling transmission belt 18 to rotate, the cooling transmission belt 18 drives the cleaning pulley 1901 to rotate, and the rotation of the cleaning pulley 1901 drives the cleaning shaft 19 to rotate.

[0038] Among them, the cooling and cleaning mechanism also includes: a cleaning cam 1902 and a cleaning spring 2001; a total of multiple groups of cleaning cams 1902 are arranged, and the multiple groups of cleaning cams 1902 are respectively fixedly connected to the two groups of cleaning shafts 19, and the multiple groups of cleaning cams 1902 are respectively rotated on the upper sides of the two groups of cleaning scrapers 20; a total of multiple groups of cleaning springs 2001 are arranged, and the multiple groups of cleaning springs 2001 are respectively fixedly connected to the inside of the preparation shield 2, and the multiple groups of cleaning springs 2001 are respectively elastically connected to the lower end surfaces of the two groups of cleaning scrapers 20. During use, the cleaning shaft 19 rotates to drive the cleaning cam 1902 to rotate, and the rotation of the cleaning cam 1902 drives the cleaning scraper 20 to slide, and the sliding of the cleaning scraper 20 drives the cleaning spring 2001 to extend and retract, and the cleaning cam 1902 and the cleaning spring 2001 drive the cleaning scraper 20 to vibrate, and the cleaning scraper 20 vibrates while cleaning the impurities on the surface of the preparation cooling roller 17, and cleans the impurities on the cleaning scraper 20.

[0039] Specific usage and function of the second embodiment: During the use of the present invention, the cooling motor 15 rotates to drive a group of cooling shafts 16 on the right side to rotate, and the rotation of a group of cooling shafts 16 on the right side drives a group of preparation cooling rollers 17 on the right side to rotate, and the rotation of a group of cooling shafts 16 on the right side drives the cooling gear 1601 to rotate, and the two groups of cooling gears 1601 mesh with each other and rotate at the same time to drive the two groups of preparation cooling rollers 17 to rotate at the same time to cool the barrier film, and the rotation of the cooling shaft 16 drives the cooling pulley 1602 to rotate, and the rotation of the cooling pulley 1602 drives the cooling transmission belt 18 to transmit, and the cooling transmission The belt 18 drives the cleaning pulley 1901 to rotate, the rotation of the cleaning pulley 1901 drives the cleaning shaft 19 to rotate, the rotation of the cleaning shaft 19 drives the cleaning cam 1902 to rotate, the rotation of the cleaning cam 1902 drives the cleaning scraper 20 to slide, the sliding of the cleaning scraper 20 drives the cleaning spring 2001 to extend and retract, the cleaning cam 1902 and the cleaning spring 2001 drive the cleaning scraper 20 to vibrate, the cleaning scraper 20 vibrates and cleans the impurities on the surface of the preparation cooling roller 17 at the same time, and cleans the impurities on the cleaning scraper 20, so as to ensure that the preparation cooling roller 17 is clean and the barrier film is cooled.

Claims

1. A packaging barrier film multilayer co-extrusion preparation device, comprising: A preparation bracket (1), a preparation shield (2), an extrusion body (3), a processing body (7), a protective guard plate (9), a blocking guard plate (14), a preparation cooling roller (17), a cleaning scraper (20), a diaphragm extrusion mechanism, an extrusion protection mechanism and a cooling cleaning mechanism; the preparation shield (2) is fixedly connected to the upper side of the preparation bracket (1); it is characterized in that the extrusion bodies (3) are provided in a plurality of groups, and the plurality of groups of extrusion bodies (3) are respectively fixedly connected to the middle position of the upper end surface of the preparation bracket (1); the processing body (7) is fixedly connected to the lower side of the inner end surface of the preparation bracket (1); the protective guard plates (9) are provided in a plurality of groups, and the plurality of groups of protective guard plates (9) are respectively rotatably connected to the upper side of the inner end surfaces of the plurality of groups of extrusion bodies (3); the blocking guard plates (1 4) A plurality of groups are provided, and the plurality of groups of blocking guard plates (14) are rotatably connected to the middle positions of the inner end surfaces of the plurality of groups of extrusion bodies (3); two groups of the preparation cooling rollers (17) are provided, and the two groups of preparation cooling rollers (17) are rotatably connected to the lower side of the inside of the preparation shield (2); two groups of the cleaning scrapers (20) are provided, and the two groups of cleaning scrapers (20) slide on the left and right sides of the inside of the preparation shield (2), and the two groups of cleaning scrapers (20) slide on the outside of the two groups of preparation cooling rollers (17); the diaphragm extrusion mechanism is provided inside the preparation shield (2); a plurality of groups of the extrusion protection mechanism are provided, and the plurality of groups of extrusion protection mechanisms are provided inside the plurality of groups of extrusion bodies (3); the cooling and cleaning mechanism is provided inside the preparation shield (2).

2. A packaging barrier film multilayer co-extrusion preparation device as claimed in claim 1, characterized in that: The diaphragm extrusion mechanism comprises: a discharge pipe (4), a change-of-direction pipe (5) and a composite preparation roller (6); the discharge pipe (4) is fixedly connected to the lower end surface of the extrusion body (3) at the middle position; a plurality of change-of-direction pipes (5) are provided, and the plurality of change-of-direction pipes (5) are respectively fixedly connected to the lower end surfaces of the extrusion bodies (3) on the left and right sides; a plurality of composite preparation rollers (6) are provided, and the two groups of composite preparation rollers (6) are respectively rotatably connected to the upper side of the inside of the preparation shield (2); the two groups of composite preparation rollers (6) are respectively rotatable on the discharge pipe (4) and the lower sides of the plurality of change-of-direction pipes (5).

3. A packaging barrier film multilayer co-extrusion preparation device as claimed in claim 1, characterized in that: The extrusion protection mechanism comprises: a protection shaft (8), a protection pulley (801), a protection transmission belt (10) and a connecting pulley (1101); the protection shaft (8) is rotatably connected to the upper side of the inside of the extrusion body (3), and the protection shaft (8) and the protection guard plate (9) are fixedly connected; the protection pulley (801) is coaxially fixedly connected to the left side of the protection shaft (8); the connecting pulley (1101) is rotatably connected to the inside of the extrusion body (3); and the protection transmission belt (10) is transmission-connected to the outer end surfaces of the protection pulley (801) and the connecting pulley (1101).

4. A packaging barrier film multilayer co-extrusion preparation device as claimed in claim 3, characterized in that: The extrusion protection mechanism further comprises: a protection half gear (11) and a direction-changing gear (12); the protection half gear (11) is coaxially fixedly connected to the right side of the connecting pulley (1101); the direction-changing gear (12) is rotatably connected to the inside of the extrusion body (3); the protection half gear (11) and the direction-changing gear (12) are meshed to form a gear transmission mechanism.

5. A packaging barrier film multilayer co-extrusion preparation device as claimed in claim 4, characterized in that: The material extrusion protection mechanism further comprises: a blocking shaft (13) and a blocking gear (1301); the blocking shaft (13) is rotatably connected inside the material extrusion body (3), and the blocking shaft (13) and the blocking guard plate (14) are fixedly connected; the blocking gear (1301) is coaxially fixedly connected to the left side of the blocking shaft (13), and the blocking gear (1301) and the direction-changing gear (12) are meshed to form a gear transmission mechanism.

6. A packaging barrier film multilayer co-extrusion preparation device as claimed in claim 1, characterized in that: The cooling and cleaning mechanism comprises: a cooling motor (15) and a cooling shaft (16); the cooling motor (15) is fixedly connected to the rear side of the preparation shield (2); two groups of cooling shafts (16) are provided, and the two groups of cooling shafts (16) are respectively rotatably connected to the lower side of the preparation shield (2), and the two groups of cooling shafts (16) are respectively coaxially fixedly connected to the two groups of preparation cooling rollers (17), and the right group of cooling shafts (16) is coaxially fixedly connected to the cooling motor (15) shaft.

7. A packaging barrier film multilayer co-extrusion preparation device as claimed in claim 6, characterized in that: The cooling and cleaning mechanism further comprises: cooling gears (1601); two groups of cooling gears (1601) are provided, the two groups of cooling gears (1601) are coaxially fixedly connected to the rear sides of the two groups of cooling shafts (16), and the two groups of cooling gears (1601) are meshed with each other to form a gear transmission mechanism.

8. A packaging barrier film multilayer co-extrusion preparation device as claimed in claim 6, characterized in that: The cooling and cleaning mechanism also includes: a cooling pulley (1602), a cooling drive belt (18), a cleaning shaft (19) and a cleaning pulley (1901); the cooling pulley (1602) is provided in two groups, and the two groups of cooling pulleys (1602) are respectively coaxially fixedly connected to the front sides of the two groups of cooling shafts (16); the cleaning shaft (19) is provided in two groups, and the two groups of cleaning shafts (19) are respectively rotatably connected inside the preparation shield (2); the cleaning pulley (1901) is provided in two groups, and the two groups of cleaning pulleys (1901) are respectively coaxially fixedly connected to the front sides of the two groups of cleaning shafts (19); the cooling drive belt (18) is provided in two groups, and the two groups of cooling drive belts (18) are respectively drivingly connected to the outer end surfaces of the two groups of cooling pulleys (1602) and the two groups of cleaning pulleys (1901).

9. A packaging barrier film multilayer co-extrusion preparation device as claimed in claim 8, characterized in that: The cooling and cleaning mechanism further comprises: a cleaning cam (1902) and a cleaning spring (2001); the cleaning cam (1902) is provided in a plurality of groups, the plurality of cleaning cams (1902) are respectively fixedly connected to the two groups of cleaning shafts (19), and the plurality of cleaning cams (1902) are respectively rotated on the upper sides of the two groups of cleaning scrapers (20); the cleaning spring (2001) is provided in a plurality of groups, the plurality of cleaning springs (2001) are respectively fixedly connected inside the preparation shield (2), and the plurality of cleaning springs (2001) are respectively elastically connected to the lower end surfaces of the two groups of cleaning scrapers (20).

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